Elastic-plastic stress analysis of a thermoplastic composite disc under parabolic temperature distribution

In this study, an elastic-plastic thermal stress analysis was carried out on a steel fiber reinforced thermoplastic composite disc under a parabolic temperature distribution. The thermal elastic and elastic-plastic solutions were obtained both analytically and numerically. Therefore, FORTRAN and ANSYS programs were used to calculate of thermal stresses for comparison. Tsai-Hill theory was used as a yield criterion during the solution. Thermal stresses occurred in the disc for the parabolic temperature distribution due to the different thermal expansions in radial and tangential directions. The magnitudes of the radial stress components were obtained to be small in comparison with the tangential stress components. Additionally, the tangential stress component was found to be cornpressive and the highest around the inner surface. According to obtained results these two solutions to be in good agreement. The intensities of the residual stress component of the tangential stress and plastic flow were the highest at the inner surface.